© Edwards Limited 2014. All rights reserved. Page 11
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Installation
A366-04-880 Issue A
3 Installation
3.1 Safety
You must ensure that the pump is suitable for your application. If you have any doubt about the suitability of the
pump for your application, refer to the Edwards guidelines on vacuum pump and vacuum system safety. (See
Associated Publications at the end of the contents list).
Obey the safety instructions listed below when you install the pump, especially when you connect the pump into an
existing system. Details of specific safety precautions are given at the appropriate point in the instructions.
The installation of your pump must be performed by a suitably trained and supervised technician.
Wear the appropriate safety-clothing when you come into contact with contaminated components.
Vent and purge your vacuum system before you start installation work.
Ensure that the installation technician is familiar with the safety procedures which relate to the pump-oil
and the products handled by the pumping system. Take suitable precautions to avoid the inhalation of oil
mist and excessive skin contact with pump-oil, as prolonged exposure can be harmful.
Disconnect the other components in the pumping system from the electrical supply so that they cannot be
operated accidentally.
3.2 System design considerations
Consider the following points when you design your pumping system:
Use a suitable valve to isolate the pump from your vacuum system if you need to allow the pump to warm up
before you pump condensable vapours or if you need to maintain vacuum when the pump is switched off.
Avoid high levels of heat input to the pump from the process gases, otherwise the pump may overheat and
seize.
If you use the pump in a high ambient temperature and have a high gas throughput, the temperature of the
pump-body may exceed 70°C. You must fit suitable guards to prevent contact with hot surfaces.
Make sure that the exhaust pipeline cannot become blocked. If you have an exhaust-isolation valve, make
sure that you cannot operate the pump with the valve closed.
Provide for a purge of inert gas when you shut down the pumping system, to dilute dangerous gases to safe
concentrations. A suitable solenoid operated gas-ballast control valve for introduction of purge-gas into the
pump is available as an accessory (see Section 7).
Ensure that a suitable supply of cooling water is available.
If you use a hydrocarbon oil in this pump, you must not use the pump to process oxygen in
concentrations greater than 25% in volume. If you do, there is a risk of fire or explosion in the oil-
box of the pump.
We do not recommend that you use the E2M175 and E2M275 pumps to pump hazardous substances.
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